64318789 has 2 divisors, whose sum is σ = 64318790. Its totient is φ = 64318788.

The previous prime is 64318783. The next prime is 64318811. The reversal of 64318789 is 98781346.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58018689 + 6300100 = 7617^2 + 2510^2 .

It is a cyclic number.

It is not a de Polignac number, because 64318789 - 2⁵ = 64318757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64318783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32159394 + 32159395.

It is an arithmetic number, because the mean of its divisors is an integer number (32159395).

Almost surely, 2^64318789 is an apocalyptic number.

It is an amenable number.

64318789 is a deficient number, since it is larger than the sum of its proper divisors (1).

64318789 is an equidigital number, since it uses as much as digits as its factorization.

64318789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 64318789 is about 8019.8995629621. The cubic root of 64318789 is about 400.6630440741.

The spelling of 64318789 in words is "sixty-four million, three hundred eighteen thousand, seven hundred eighty-nine".